Question

当我尝试将数据从我的UITableView传递到另一个UIViewController时，我遇到了一个问题。我应该怎么做我的“If”语句才能传递每个选定单元格的数据？你能帮我个忙吗？

的ViewController：

    import UIKit

    class ViewController: UIViewController, UICollectionViewDataSource, UITableViewDataSource, UITableViewDelegate {

        @IBOutlet weak var tableViewTopSell: UITableView!
        @IBOutlet var collectionView: UICollectionView!
        @IBOutlet weak var collectionViewBanner: UICollectionView!


        var dataSource: [Content] = [Content]()
        var dataBanner: [Banner] = [Banner]()
        var dataTopSold: [Top10] = [Top10]()

        override func viewDidLoad() {
            super.viewDidLoad()
            //Delegate TableView
            self.tableViewTopSell.delegate = self
            //SetupNavBarCustom
            self.navigationController?.navigationBar.CustomNavigationBar()
            let logo = UIImage(named: "tag.png")
            let imageView = UIImageView(image:logo)
            self.navigationItem.titleView = imageView
            //CallAPIData
            getTopSold { (data) in
                DispatchQueue.main.async {
                    self.dataTopSold = data
                    self.tableViewTopSell.reloadData()
                }
            }
            getBanner { (data) in
                DispatchQueue.main.async {
                self.dataBanner = data
                self.collectionViewBanner.reloadData()
                }
            }
            getAudiobooksAPI { (data) in
                DispatchQueue.main.async {
                    self.dataSource = data
                    self.collectionView.reloadData()
                }
            }
        }
        //CollectionView
        func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
            if (collectionView == self.collectionView) {
                return  self.dataSource.count
            }else{
                return self.dataBanner.count
            }}
        func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

            if (collectionView == self.collectionView) {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionViewCell", for: indexPath) as! CollectionViewCell

            let content = self.dataSource[indexPath.item]

            cell.bookLabel.text = content.descricao
            cell.bookImage.setImage(url: content.urlImagem, placeholder: "")

            return cell

            }else if (collectionView == self.collectionViewBanner) {

                let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionViewCellBanner", for: indexPath) as! CollectionViewCell

                let content = self.dataBanner[indexPath.item]

                cell.bannerImage.setImage(url: content.urlImagem, placeholder: "")


                return cell
            }
            return UICollectionViewCell()
        }
    //TableView
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.dataTopSold.count
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "topSoldCell", for: indexPath) as! TableViewCell

        let content = self.dataTopSold[indexPath.item]
        cell.labelNomeTopSell.text = content.nome
        cell.imageViewTopSell.setImage(url: content.urlImagem, placeholder: "")
        cell.labelPrecoDe.text = "R$ \(content.precoDe)"
        cell.labelPrecoPor.text = "R$ 119.99"
        return cell
    }
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        performSegue(withIdentifier: "segueId", sender:self.dataTopSold[indexPath.item])

        }

        override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

            if segue.identifier == "segueId" {

                let des = segue.destination as! TelaDetalheProdutos

                des.stringNomeeDesc = sender as? String

            }
        }

    }

extension UIImageView{
    func setImage(url : String, placeholder: String, callback : (() -> Void)? = nil){
        self.image = UIImage(named: "no-photo")

        URLSession.shared.dataTask(with: NSURL(string: url)! as URL, completionHandler: { (data, response, error) -> Void in

            guard error == nil else{
                return
            }
            DispatchQueue.main.async(execute: { () -> Void in
                let image = UIImage(data: data!)
                self.image = image

                if let callback = callback{
                    callback()
                }


            })

        }).resume()
    }
}

AudioBook文件：

import Foundation

//Categorias
struct Contents : Decodable {
    let data : [Content]
}
struct Content : Decodable {
    let id : Int
    let descricao : String
    let urlImagem : String
}
//Banner
struct BannerData : Decodable {
    let data : [Banner]
}
struct Banner : Decodable {
    let id : Int
    let urlImagem : String
    let linkUrl : String
}
//Top10
struct Top10Data:Decodable {
    let data: [Top10]
}
struct Top10:Decodable {
    let id : Int
    let nome : String
    let urlImagem : String
    let descricao : String
    let precoDe : Int
}

详情ViewController：

import UIKit

class TelaDetalheProdutos: UIViewController {
    //Properties
    @IBOutlet weak var ImageView: UIImageView!
    @IBOutlet weak var labelNomeEDesc: UILabel!
    @IBOutlet weak var labelDe: UILabel!
    @IBOutlet weak var labelPor: UILabel!
    @IBOutlet weak var labelNomeProduto: UILabel!
    @IBOutlet weak var labelDescricao: UILabel!
    //Strings
    var stringImageView = String()
    var stringNomeeDesc = String()
    var stringLabelDe = String()
    var stringLabelPor = String()
    var stringNomeProduto = String()
    var stringlabeDescricao = String()

    override func viewDidLoad() {
        super.viewDidLoad()

    ***//What should I do here?***

    }

}

[编辑1]：

我这样做，但是我遇到了这个崩溃：

无法将“Top10”类型的值指定为“String”
类型

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "topSoldCell", for: indexPath) as! TableViewCell

    let content = self.dataTopSold[indexPath.item]
    cell.labelNomeTopSell.text = content.nome
    cell.imageViewTopSell.setImage(url: content.urlImagem, placeholder: "")
    cell.labelPrecoDe.text = "R$ \(content.precoDe)"
    cell.labelPrecoPor.text = "R$ 119.99"
    return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    performSegue(withIdentifier: "segueId", sender:self.dataTopSold[indexPath.row])

    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

         if segue.identifier == "segueId" {

        let des = segue.destination as! TelaDetalheProdutos

        des.stringNomeeDesc = sender as! Top10
    }
}

[编辑3] -SOLVED - 在Storyboard中发生的事情我将UITableViewCell链接到其他屏幕而不是链接ViewController 。这就是它出现两次的原因。

当屏幕在选择单元格后进行转换时，包含结果的下一个屏幕会自动出现两次。它第一次有空字段，在1秒或更短的时间后，又有一次自动转换，但这次包含了我传递的所有数据。当我点击“返回”TopBar按钮时会发生同样的情况。可能会发生什么？

Answer 1

你可以尝试

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    performSegue(withIdentifier: "segueId", sender:self.dataTopSold[indexPath.row])

}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    if segue.identifier == "segueId" {

        let des = segue.destination as! TelaDetalheProdutos

        des.item = sender as! Top10
    }
}

//

class TelaDetalheProdutos: UIViewController {

   var item:Top10?

}

Answer 2

将选定的索引路径保存在did select

中

准备segue获取数据并将其传递给DetailViewController

//in prepare for segue
let content = self.dataTopSold[indexPath.item]
//cast segue.destination controller to DetailViewController and pass content
guard let detailViewController = segue.destinationViewController as? DetailViewController else {return}
detailViewController.content = content

从UITableViewCell

2 个答案: